whatis命令：关于命令的简短描述

一、命令简介

​whatis​ 命令用于查询命令、函数、文件等的基本用途，查询结果只是一句简短的描述。

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例如

$ whatis ls
ls (1)               - list directory contents

返回关于 ls 命令的简短描述。这个结果实质是来自于man手册的一个章节，在较新的Linux 发行版中已经使用 man -f command​ 命令取代 whatis command​ 命令了。

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二、命令参数

whatis command

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三、命令示例

whatis ls
ls (1)               - list directory contentswhatis mdadm
mdadm (8)            - manage MD devices aka Linux Software RAIDwhatis locate
locate (1)           - find files by name, quicklywhatis chmod
chmod (1)            - change file mode bits
chmod (2)            - change permissions of a filewhatis chgrp
chgrp (1)            - change group ownershipwhatis useradd
useradd (8)          - create a new user or update default new user informationwhatis userdel
userdel (8)          - delete a user account and related fileswhatis tar
tar (1)              - an archiving utility

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